Depo Provera

However, a possible increase in risk has been found among current, longer-term users compared to women who never used Depo Provera [44-45].

Hormone-releasing IUDs

Findings on hormone-releasing IUDs and breast cancer are mixed. Some show these IUDs have no impact on breast cancer risk [46-47]. Others show hormone-releasing IUDs increase risk by about 20 percent (similar to birth control pills) [40].

Other findings suggest past use of hormone-releasing IUDs may increase breast cancer risk after menopause [48].

Birth control patch and vaginal ring

The birth control patch and vaginal ring do not appear to increase breast cancer risk [40]. However, data are limited at this time.